Higher education workers are walking out over the coming days in a third wave of strikes over pay.
The Unison union said some of the lowest paid in the university sector, including administrators, cleaners, library, security and catering staff, are among those taking industrial action.
Universities including those in Edinburgh, Brighton, Bristol, Glasgow, Leeds, Liverpool and Manchester will be affected.
For most of the 17 institutions affected, it is the third wave of industrial action this academic year. Strikes have already taken place in September, October and November.
The dispute is over a 3% pay offer made last May which was rejected by university support staff but paid to most of them in August.
